Chemistry
4 L of oxygen at a pressure of 400 Kpa and 1L of nitrogen at 200 Kpa were introduced in to 2 L vessel. (A)What is the total pressure of the gases in the vessel. (B)What is the mole fraction of each gas?
Chemistry
A solution contains 15 g non-volatile non-electrolyte solute C6H14O6 dissolved in 500 g of water at 40 c. Calculate (A)Vapor pressure of the solution. (B)Boiling point of the solution. (C)Freezing point of the solution.
Chemistry
H2SO4 solution containing 200.1 g of H2SO4 in 0.3500 L OF solution has a density of 1.3294 g/ml.calculate (A) Mass%H2SO4(m/m) (B)mass%H2O(m/m) (C)Molarity (D)Molality
Chemistry
H2SO4 solution containing 200.1 g of H2SO4 in 0.3500 L OF solution has a density of 1.3294 g/ml.calculate (A) Mass%H2SO4(m/m) (B)mass%H2O(m/m) (C)Molarity (D)Molality
Maths
If the dimension of a right rectangular prism are 7cm,9cm and 3cm,then find (A) Its total surface area (B) Its volume (C) the length of its diagonal
Educational psychology
Explean the chinese proverb "I hear and I forget;I see and I remember;I do and I understand",from instructional materials and active learning dimensions.
Chemistry
List three advantages and three disadvantages of improvised apparatus in teaching chemistry?
Chemistry
What is the reason that chemists chatagories Fe,Co and Ni in the same group VIIIB?
Chemistry
Distinguish between an absorption spectrum and an emission spectrum.with which did bohr work?
Chemistry
An electron in the n=5 level of an H atom emit a photon of wavelength 1281nm. To what energy level does the electron move? Thanks for ur help.
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